I think ghostery.com should explain better what it is on their own page. The small text sounds as if web bugs are a good thing.
On a related note, it seems to me that advertising companies like DoubleClick aren't in the news as much as they could. I feel like I never hear anything about them, and in particular in terms of privacy issues, while they should be amongst the first to be suspected and talked about. No?
"It's data that's practically a printout of what's going on in your brain: What you are thinking of buying, who you talk to, what you talk about." --Kevin Bankston, staff attorney, Electronic Frontier Foundation
Add to this GOOG CEO's AAPL board membership and their 1984 Superbowl ad, and be scared to death with the alu macbook digital restriction management.
ps: DoubleClick is related to GOOG (layoffs); the latter also swept up urchin.js -- look for this program on your PC, and dig into what it does. Far more than a "stray" pixel.
As to understand why this fuss about advertising: it is an extremely latent and powerful means of exercising power. I would suggest Adam Curtis, Century of the Self in particular. (e.g. from Brewster Khale's archive.org)
When you're trying to explain what you do it's best to go with words people know and leave coining new terms to Snoop Dogg.
Spyware cookies are something invented by Spyware software vendors to sell more software.
"Spyware cookies" miss the issue IMHO. It is the responsibility of the sites you visit to remain transparent; focusing on "cookies" incorrectly makes it a 3rd party service issue, i.e. tell me who allowed the cookie to be set in the first place not just that it exists.